implement priority in calling do().

store module.do instead of module, making this an awful lot like
an internal command bus. steal a trick from irclib and sort based
on priority, while we're at it. we added priority a while ago, and
this means that low prio (high value) items are called later, meaning
we can do things like

!join #botname

and have the IrcAdmin handler handle it before MegaHAL gets to it

DrBotIRC.py

@@ -16,6 +16,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 
+import bisect
 from ConfigParser import NoOptionError, NoSectionError
 import re
 import signal
@@ -81,6 +82,7 @@ class DrBotIRC(irclib.IRC):
     """Implement a customized irclib IRC."""
 
     modlist = []
+    internal_bus = []
     config = None
     server = None
 
@@ -228,8 +230,8 @@ class DrBotIRC(irclib.IRC):
         """Walk the loaded modules, see if any reply to input text."""
 
         # aliases resolved. run result against each module
-        for module in self.modlist:
-            ret = module.do(connection, event, nick, userhost, attempt, admin_unlocked)
+        for (priority, handler) in self.internal_bus:
+            ret = handler(connection, event, nick, userhost, attempt, admin_unlocked)
             if ret is not None:
                 # a module had a result for us, post-alias, so return it
                 # TODO: scan all modules with compounding results
@@ -268,6 +270,7 @@ class DrBotIRC(irclib.IRC):
             module = sys.modules[modstr]
             botmod = eval('module.' + modname + '(self, self.config, self.server)')
             self.modlist.append(botmod)
+            bisect.insort(self.internal_bus, (botmod.priority(), botmod.do))
             botmod.register_handlers(self.server)
 
             # might as well add it to the list
@@ -290,6 +293,7 @@ class DrBotIRC(irclib.IRC):
 
                 # remove module references
                 self.modlist.remove(module)
+                self.internal_bus.remove((module.priority(), module.do))
                 module.unregister_handlers()
 
                 # del it